Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Combined holophote laser resonant cavity composed of right-angle round platform inboard surface and right-angle taper outboard surface

A technology of laser resonator and inner surface, which is applied in the field of laser resonator, can solve problems such as inability to eliminate the uneven distribution of the center and edge of the gain medium, inability to realize circular hollow spot laser output, and low thermal stability of the rectangular conical prism cavity. Achieve reliable performance, easy modification, and reduce thermal distortion

Inactive Publication Date: 2008-07-23
HUAZHONG UNIV OF SCI & TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the parallel plane cavity are: the adjustment accuracy is extremely high and it is easy to misalign. Compared with the stable cavity, the loss is also large, and it is not suitable for small gain devices.
However, the disadvantages of these two types of resonators are: the influence of the uneven distribution of the center and edge of the gain medium cannot be eliminated; the area of ​​the output laser spot cannot be compressed to increase the power density of the output spot, and the laser output of the annular hollow spot cannot be realized; the right-angle The thermal stability of the conical prism cavity is low, and the prisms in some laser bands need to be manufactured with special optical crystals, which are expensive

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Combined holophote laser resonant cavity composed of right-angle round platform inboard surface and right-angle taper outboard surface
  • Combined holophote laser resonant cavity composed of right-angle round platform inboard surface and right-angle taper outboard surface
  • Combined holophote laser resonant cavity composed of right-angle round platform inboard surface and right-angle taper outboard surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Depend on Figure 6 ~ Figure 7 As shown, the present invention includes a total reflection mirror 1, an output mirror 2 and a laser working medium 3. The total reflection mirror 1 is composed of an inner surface 4 of a right-angled circular frustum and an outer surface 5 of a reverse right-angled cone. The output mirror 2 is an integral plane mirror composed of a circular plane 11 and a concentric ring-shaped plane 12 on the edge. The circular plane 11 is coated with a semi-transparent and semi-reflective film as a laser output port, and the ring-shaped plane 12 is coated with a high-reflection film. , the dimensional relationship between them is Фd=Фb=2Фc, where Фc is the diameter of the circular plane 11 , and Фd is the diameter of the output mirror 2 .

[0047] Embodiment 1 The effective laser output spot area of ​​the laser resonator is 1 / 4 of the bottom surface area of ​​the total reflection mirror 1, which can greatly increase the laser output power density. The ...

Embodiment 2

[0049] Depend on Figure 8 ~ Figure 11 As shown, the present invention includes a total reflection mirror 1, an output mirror 2 and a laser working medium 3. The total reflection mirror 1 is composed of an inner surface 4 of a right-angled circular frustum and an outer surface 5 of a reverse right-angled cone. The output mirror 2 is a split output mirror, which is made up of a circular plane half-mirror 13 and a concentric annular plane full-mirror 14 on the edge, and the circular plane half-mirror 13 and the annular plane full-mirror 14 The axes of rotational symmetry are coaxial, and the dimensional relationship between them is Фd=Фb=2Фc, Фe>Фc, Фf>Фd, where Фc is the diameter of the circular flat half mirror 13, and Фd is the diameter of the output mirror 2, Фe is the installation size of the circular plane half-mirror 13 , and Фf is the installation size of the output mirror 2 . 15 is an annular cooling water tank of the output mirror 2, and 16 is an annular cover plate. ...

Embodiment 3

[0052] Depend on Figure 12 to Figure 14 As shown, the present invention includes a total reflection mirror 1, an output mirror 2 and a laser working medium 3. The total reflection mirror 1 is composed of an inner surface 4 of a right-angled circular frustum and an outer surface 5 of a reverse right-angled cone. The output mirror 2 is a split output mirror, which is made up of the concentric ring-shaped total reflection mirror 17 of the circular plane half-mirror 13 and the edge, and the concentric ring-shaped total reflection mirror 17 is composed of the inner surface 18 and the The outer surface 19 of the opposite second right-angled circular truncated form, the rotational symmetry axes of the two right-angled circular pedestals are coaxial, the inner surface 18 of the first right-angled circular pedestal and the outer surface 19 of the second right-angled circular pedestal are high reflective surfaces, circular planes The half-transparent mirror 13 and the concentric ring-s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The disclosed total-reflection laser cavity comprises a total-reflection mirror composed by a right-angle rotary table medial surface and a coaxial right-angle conical lateral surface both as high reflecting surfaces, an output mirror, and the laser active medium. Wherein, there is a size relation PHIb=2PHIa with PHIa as the diameter of contact circle between the lateral and medial surfaces, and PHIb as the bottom diameter of the total-reflector. This invention has well performance and wide application.

Description

technical field [0001] The invention relates to laser resonators. Background technique [0002] In many occasions of laser applications, such as laser drilling, welding, cutting, and laser medical micro-precision processing, it is hoped that the laser can best work in the fundamental mode state with the smallest divergence angle. In order to improve the quality of the laser beam, traditional mode selection techniques (such as using an aperture stop) can improve the quality of the laser output beam, but the use of an aperture stop limits the mode volume to a large extent and increases the mode loss. [0003] The main problem in the design of high-power laser devices is how to obtain the largest possible mode volume and good transverse mode discrimination ability to achieve high-power single-mode operation, so as to extract energy efficiently from the active material and Can maintain high beam quality. [0004] There are three types of laser resonators: stable cavity, unstab...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/08
Inventor 秦应雄程祖海唐霞辉武建强李正佳程愿应王汉生
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products